Adds TGS4 from https://github.com/tgstation/tgstation-server to Virgo, allowing auto-update functionality and testmerges.
How well it runs depends on how @Arokha sets things up. :p
* From tgstation/tgstation#27196
* The mc will now punish subsystems that overrun their tick allotment with less allotment in later fires.
* The punisher also delays the next fire of subsystems that overrun. Because of how this is ends up being calculated, this will almost never actually kick in, but sometimes subsystems like garbage will overrun into multiple ticks, so delaying their next fire is needed.
* The punisher does not delay the next fire of SS_TICKER subsystems (tgstation/tgstation#34964)
Note: SS_KEEP_TIMING subsystems do not get their next fire delayed.
* Creates the SSair subsystem which replaces the Setup, Start(), and Tick() procs of air_master.
* It may be best to have SSair completely replace air_master, but for now we are having them work together. It does completely replace the old processScheduer air ticker however.
* Remove the obsolete Setup and Tick procs.
* Adjust admin and debug verbs that dealt with some ZAS internals to work with the new implementation.
* Adds defines for world.tick_usage
* This provides no useful benefit whatsoever, but /tg and Baystation12 have done it, so it will make porting future code easier if we do too. No real harm done either.
Mostly ports /tg/'s method of seeding submaps into specific z-levels.
Due to the low number of submaps present, all of the PoIs are guaranteed to spawn. As more are added, this should fix itself.
